Garden hybrid
This is a garden hybrid, bred from more than one wild species, so it has no single species page of its own.
3 other cultivars
The Story
Plant Bio
Allium x hybrida 'Windy City' is a robust perennial featuring spherical clusters of purple flowers atop slender, upright stems, with narrow, grass-like foliage that forms a dense clump.
This cultivar is prized for its large, vibrant flower heads that create striking visual impact in borders and are particularly attractive to pollinators.
Uses & Benefits:
Bred from more than one wild species, so it has no species page of its own.
Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
18 inches
Width
12 inches
Light
Full Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
Eurasia
Toxicity
Toxic to pets if ingested
Bloom period
Mid-summer – Late summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck bulbs 4-6 inches deep in well-drained soil.
- Plant in full sun for best flowering results.
- Water regularly during active growth, especially in dry periods.
- Mulch to retain moisture and suppress weeds.
- Divide clumps every 3-4 years in late summer or early fall.
- Remove faded flower heads to promote tidiness.
Pro Tip
Plant bulbs in well-drained soil with full sun for vibrant blooms.
Keep It Thriving
Care Guide
Do
- Water during dry spells 🌱
- Apply a balanced fertilizer in early spring
- Divide every 3-4 years
Don't
- Avoid overwatering to prevent bulb rot ❌
- Don’t cut back foliage until fully yellow
- Don’t plant in poorly drained soil
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Allium Windy City questions
What zones can Allium Windy City grow in?
Allium Windy City is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Allium Windy City deer resistant?
Yes — Allium Windy City is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Allium Windy City bloom?
Allium Windy City typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Allium Windy City need full sun?
Allium Windy City does best in full sun (6+ hours).
Is Allium Windy City drought tolerant?
Yes — once established (usually after the first full season), Allium Windy City handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Allium to compare
Millennium Gold Onion Moly Onion
Allium x moly 'Millenium'
Ornamental Onion 'Ambassador'
Allium cybum 'Ambassador'
Blue Eddy Allium
Allium senescens 'Blue Eddy'
Drumstick Allium
Allium sphaerocephalon
Globemaster Allium
Allium giganteum 'Globemaster'
Purple Sensation Allium
Allium hollandicum 'Purple Sensation'
Keep exploring
Explore the genus
Grow Allium Windy City with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.